In Relation puzzle type, mutual blood relations or other information of more than two persons are mentioned and information about any two is mentioned.

A party consists of grandmother, father, mother, four sons and their wives and one son and two daughters to each of the sons.
How many females are there is all ?

A. 14
B. 16
C. 18
D. 24
E. None of these
Answer: A . 14


Grandmother is one female, mother is another, wivves of four sons are the four females and two daughters of all four sons are eight females.
So, in all there are 1 + 1 + 4 + 8 = 14 females.